CN222231760U - Multi-runner cavitation venturi tube - Google Patents

Abstract

The utility model provides a multi-channel cavitation venturi tube, which belongs to the technical field of pipelines and comprises a tube body, wherein the tube body comprises a medium inlet and a medium outlet, a first channel is arranged at one end, close to the medium inlet, of the tube body, a second channel is arranged at one end, close to the medium outlet, of the tube body, a plurality of venturi channels are arranged between the first channel and the second channel and are communicated with each other, and the venturi channels are uniformly arranged along the circumferential direction of the tube body.

Description

Multi-runner cavitation venturi tube

Technical Field

The utility model relates to the technical field of pipelines, in particular to a multi-channel cavitation venturi tube.

Background

Cavitation venturis use cavitation to control flow and pressure. The cavitation venturi tube works in such a way that fluid enters from one end, is restrained and decelerated in the venturi tube, after the flow of the fluid expands to the diameter of a measured tube, the pressure of the fluid rapidly drops, when the flow exceeds a certain value, the fluid generates steam to generate bubbles, cavitation is formed, the bubbles generated by cavitation flow with a part of the fluid, the pressure rises, the liquid phase is interrupted, the bubbles disappear, the pressure is equalized, then the bubbles are generated again, the fluid is circulated continuously, and finally the fluid flows out from the other end. However, most of the conventional cavitation venturi tube designs adopt a single flow channel structure, and the flexibility is insufficient in application, for example, the effects of diversion and cavitation energy reduction cannot be achieved.

Disclosure of utility model

The utility model aims to overcome the defects and the shortcomings of the prior art and provides a multi-runner cavitation venturi tube.

The technical scheme includes that the multi-runner cavitation venturi tube comprises a tube body, wherein the tube body comprises a medium inlet and a medium outlet, a first runner is arranged at one end, close to the medium inlet, of the tube body, a second runner is arranged at one end, close to the medium outlet, of the tube body, a plurality of venturi runners are arranged between the first runner and the second runner, the venturi runners are communicated with the first runner and the second runner, and the venturi runners are uniformly arranged along the circumferential direction of the tube body.

The venturi flow passage includes a constriction portion gradually constricting from the first flow passage to the throat portion, the throat portion having a smallest cross-sectional area, and an expansion portion gradually expanding from the throat portion to the second flow passage.

The inner wall of the contraction part is arc-shaped, and the radius of the inner wall is not less than half of the diameter of the throat part.

The expansion part comprises a first expansion section and a second expansion section, the first expansion section and the second expansion section are sequentially arranged along the direction from the throat part to the second flow passage, and the taper of the inner wall of the first expansion section is smaller than that of the inner wall of the second expansion section.

The connecting position of the first expansion section and the second expansion section is uniformly provided with a plurality of lamellar bodies along the circumferential direction, the top of lamellar body is the arc, and one end of lamellar body is inclined gradually to the inner wall of the first expansion section, and the other end is inclined gradually to the inner wall of the second expansion section.

The length of the first expansion section is greater than the length of the second expansion section.

The venturi flow channel is characterized by further comprising a mounting tube which is detachably arranged in the tube body, a plurality of venturi flow channels are circumferentially and uniformly arranged on the mounting tube, one end of the second flow channel, which is close to the mounting tube, is inwards provided with a limiting ring part, and one end of the mounting tube is in butt joint with the limiting ring part.

The taper of the inner wall of the limiting ring part is the same as that of the inner wall of the second expansion section.

The side of the first flow passage, which is close to the Venturi flow passage, is provided with an arc concave surface, and the initial section of the Venturi flow passage is arranged on the arc concave surface.

The utility model has the advantages that the utility model adopts a multi-runner structure design to ensure that fluid is dispersed and evenly enters the Venturi, thereby reducing cavitation energy and noise, simultaneously adopts a multi-runner balance design to ensure that vibration is mutually interfered and counteracted, and reduces the whole vibration amplitude of equipment, and secondly, compared with a single-runner cavitation Venturi and a multi-runner cavitation Venturi tube, the utility model is beneficial to the occurrence of cavitation phenomenon, has compact structure and light weight, and is beneficial to the vibration resistance requirement of the pipeline and the design of a supporting structure.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that it is within the scope of the utility model to one skilled in the art to obtain other drawings from these drawings without inventive faculty.

FIG. 1 is a cross-sectional view of a first embodiment;

FIG. 2 is a schematic diagram of a first embodiment;

FIG. 3 is a cross-sectional view of the venturi flow passage of the first embodiment;

FIG. 4 is a cross-sectional view of a venturi flow passage in a first embodiment;

FIG. 5 is a cross-sectional view of a second embodiment;

Fig. 6 is a cross-sectional view of the third embodiment.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

In the description of the present application, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intermediate medium, or in communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In the description of the present utility model, it should be noted that, in the embodiments of the present utility model, all the expressions "first" and "second" are used for distinguishing two entities with the same name and non-same parameters, and it is noted that the "first" and "second" are merely for convenience of description, and should not be construed as limiting the embodiments of the present utility model, and the following embodiments are not described in any way.

Embodiment one:

As shown in fig. 1 to 4, a multi-channel cavitation venturi tube comprises a tube body 1, wherein the tube body 1 comprises a medium inlet 101 and a medium outlet 102, a first channel 2 is arranged at one end, close to the medium inlet 101, of the tube body 1, a second channel 3 is arranged at one end, close to the medium outlet 102, of the tube body 1, a plurality of venturi channels 4 are arranged between the first channel 2 and the second channel 3, the venturi channels 4 are communicated with the first channel 2 and the second channel 3, the venturi channels 4 are uniformly arranged along the circumferential direction of the tube body 1, a multi-channel structure design is adopted, so that fluid is dispersed and uniformly enters the venturi, cavitation energy is reduced, noise is reduced, meanwhile, the multi-channel balance design is adopted, vibration mutually interferes and offset is reduced, and the whole vibration amplitude of the device is reduced, and secondly, compared with the single-channel cavitation venturi tube, the multi-channel cavitation tube is beneficial to the occurrence of cavitation phenomenon, and has compact structure and light weight, and is beneficial to the vibration-resistant requirement and support structure design.

The number of the venturi flow channels 4 is at least two, in this embodiment, four venturi flow channels 4 are adopted for balancing, so that fluid load distribution in the circumferential direction of the pipe body 1 is more uniform, balance of the pipe body is maintained, mutual interference of vibration is counteracted, and integral vibration amplitude of the equipment is reduced.

The venturi flow channel 4 comprises a constriction part 41, a throat part 42 and an expansion part 43, the constriction part 41 gradually constricts to the throat part 42 from the first flow channel 2, the throat part 42 has the smallest cross section area, the speed and the pressure of fluid flowing through the part can be precisely controlled, the key is that cavitation is prevented, meanwhile, the flow can be monitored and regulated, the expansion part 43 gradually expands to the second flow channel 3 from the throat part 42, the fluid is accelerated when passing through the constriction part 41, the throat part 42 reaches the highest speed, the pressure energy is converted into kinetic energy in the process, and the kinetic energy is converted back into pressure energy in the expansion part 43, so that the high-efficiency utilization of the fluid energy is realized.

The inner wall of the constriction 41 is curved with a radius not less than half the diameter of the throat 42, the curved inner wall facilitating a smooth transition of the fluid, where the inflow is able to more rapidly flow into the constriction 41 when the curve is not less than half the diameter of the throat 42.

The expansion part 43 comprises a first expansion section 431 and a second expansion section 432, the first expansion section 431 and the second expansion section 432 are sequentially arranged along the direction from the throat 42 to the second flow channel 3, the taper of the inner wall of the first expansion section 431 is smaller than that of the inner wall of the second expansion section 432, and the expansion part 43 is divided into two sections with different taper, so that the pressure recovery process of fluid can be controlled more finely, the pressure recovery process is flatter and more efficient, noise and vibration generated during fluid flow can be reduced, and the stability of a pipeline system can be improved.

The connection position of the first expansion section 431 and the second expansion section 432 is uniformly provided with a plurality of lamellar bodies 401 along the circumferential direction, the top of each lamellar body 401 is arc-shaped, one end of each lamellar body is gradually inclined towards the inner wall of the first expansion section 431, the other end of each lamellar body is gradually inclined towards the inner wall of the second expansion section 432, the effects of controlling fluid and optimizing the flow direction of the fluid are achieved, the structural strength of the expansion part can be enhanced, and particularly the connection position of the two expansion sections is easy to be impacted by the fluid.

The length of the first expansion section 431 is greater than that of the second expansion section 432, and the longer first expansion section 431 allows the fluid to have a longer distance to perform preliminary pressure recovery before entering the second expansion section 432, so that the pressure recovery process is mild and efficient.

Embodiment two:

As shown in fig. 5, the improvement is performed on the basis of the first embodiment, and specifically, the venturi flow channel device further comprises a mounting pipe 5 detachably arranged in the pipe body 1, and a plurality of venturi flow channels 4 are circumferentially and uniformly arranged on the mounting pipe 5, so that the venturi flow channels 4 and the inside of the pipe body 1 are convenient to clean and maintain, and meanwhile, the number and the positions of the flow channels are convenient to adjust according to actual needs so as to adapt to different working conditions.

One end of the second runner 3, which is close to the installation pipe 5, is inwards provided with a limiting ring part 31, one end of the installation pipe 5 is abutted against the limiting ring part 31, and the other end of the installation pipe can be fixed through a fixing ring which can be in threaded connection with the installation pipe 5, or one side of the first runner 2, which is close to the venturi runner 4, is provided with an annular groove, and the annular groove is internally provided with a clamping ring for fixing the installation pipe 5. The stop collar portion 31 also increases the impact resistance of the mounting tube 5.

The taper of the inner wall of the limit ring part 31 is the same as the taper of the inner wall of the second expansion section 432, which is favorable for flow matching when the fluid is converted from the venturi flow channel 4 to the second flow channel 3, and reduces flow loss.

Embodiment III:

As shown in fig. 6, an improvement is made on the basis of the first embodiment and/or the second embodiment, specifically, an arc concave surface 201 is disposed on a side, close to the venturi flow channel 4, of the first flow channel 2, and a starting section of the venturi flow channel 4 is opened on the arc concave surface 201, so that turbulence intensity when fluid enters is reduced, and stability of the fluid is improved.

Further, the inner wall of the throat 42 is provided with at least two dividing pieces 421 along the axial direction, and the dividing pieces 421 are uniformly arranged along the circumferential direction of the inner wall of the throat 42, which is helpful for the stability of the fluid passing through the throat at high speed, and reduces the flow separation and turbulence, and the dividing pieces 421 are provided with cutting edges 422 at least towards one end of the first flow channel 2, so that the blockage of the throat is avoided, and the self-cleaning capability of the pipeline system is improved.

The foregoing disclosure is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims.

Claims (9)

1. The utility model provides a multichannel cavitation venturi, its characterized in that, including body (1), body (1) are including medium entry (101) and medium export (102), body (1) are being provided with first runner (2) in the one end that is close to medium entry (101), and it is provided with second runner (3) in the one end that is close to medium export (102), be provided with a plurality of venturi runners (4) between first runner (2) and second runner (3), venturi runner (4) intercommunication first runner (2) and second runner (3), a plurality of venturi runners (4) are evenly set up along body (1) circumference.

2. A multi-channel cavitation venturi according to claim 1, characterized in that the venturi channel (4) comprises a constriction (41), a throat (42) and an expansion (43), the constriction (41) being gradually constricted from the first channel (2) to the throat (42), the throat (42) having a smallest cross-sectional area, the expansion (43) being gradually expanded from the throat (42) to the second channel (3).

3. A multi-flow cavitation venturi according to claim 2, wherein the inner wall of the constriction (41) is arcuate with a radius not less than half the diameter of the throat (42).

4. The multi-channel cavitation venturi tube according to claim 2, wherein the expansion portion (43) comprises a first expansion section (431) and a second expansion section (432), the first expansion section (431) and the second expansion section (432) are sequentially arranged along the direction from the throat (42) to the second flow channel (3), and the taper of the inner wall of the first expansion section (431) is smaller than that of the inner wall of the second expansion section (432).

5. The multi-channel cavitation venturi tube according to claim 4, wherein a plurality of lamellar bodies (401) are uniformly arranged at the connection position of the first expansion section (431) and the second expansion section (432) along the circumferential direction, the tops of the lamellar bodies (401) are arc-shaped, one ends of the lamellar bodies are gradually inclined towards the inner wall of the first expansion section (431), and the other ends of the lamellar bodies are gradually inclined towards the inner wall of the second expansion section (432).

6. The multiple flow path cavitation venturi of claim 4, wherein the length of the first expansion section (431) is greater than the length of the second expansion section (432).

7. The multi-flow-passage cavitation venturi tube according to claim 4, further comprising a mounting tube (5) detachably arranged in the tube body (1), wherein a plurality of the venturi flow passages (4) are circumferentially and uniformly arranged on the mounting tube (5), a limiting ring portion (31) is inwardly arranged at one end of the second flow passage (3) close to the mounting tube (5), and one end of the mounting tube (5) is abutted against the limiting ring portion (31).

8. A multi-channel cavitation venturi according to claim 7, wherein the taper of the inner wall of the stop collar portion (31) is the same as the taper of the inner wall of the second diverging section (432).

9. The multi-runner cavitation venturi according to claim 1, wherein an arc-shaped concave surface (201) is arranged on one side of the first runner (2) close to the venturi runner (4), and a starting section of the venturi runner (4) is arranged on the arc-shaped concave surface (201).